The biggest thing that makes me keep going back to graphviz despite there being nicer libraries available is that because it uses a really simple markup languag

The biggest thing that makes me keep going back to graphviz despite there being nicer libraries available is that because it uses a really simple markup language instead of code or complex objects, I can juts put a handful of print/write statements into any program I want to analyse and pipe it to graphviz to give me nice graphical overview of what's going where. I've used it to visualise/debug everything from web scrapers in Python to directory scanning in Bash to proper graph algorithms in Java. Every time with no library installation or anything, just simple prints to a stream/file and perhaps a system() call at the end if I'm running it often enough.